Sprint Filter P08 F1-85 Air Filter for Racing – Kawasaki Ninja 1000 SX (2020–2026) PM111S F1-85

A Kawasaki Ninja 1000 SX usually reaches the circuit under its own power, does its sessions and rides home the same evening. That is most of the appeal of the bike, and it is also the awkward part of fitting a racing air filter to it. The Sprint Filter PM111S F1-85 uses the P08 F1-85 medium, which passes 15,000 l/m²/sec where the standard P08 fabric passes 5,050 — and it buys that air flow with a coarser weave, 85 microns instead of 80. The element cannot tell the track day from the Monday commute. Whatever it lets through on two fast laps, it lets through on the four hundred kilometres of road riding either side of them.

Key Features

• A racing medium in dry polyester: 85 microns, 15,000 l/m²/sec
• Against the standard P08 (80 microns, 5,050 l/m²/sec): roughly three times the air, less retention — a trade, not a grade
• Either way the filtering surface is roughly double that of other performance filters
• No oil in it, so nothing sets off downstream towards sensors or throttle bodies
• Original element out, this one in — standard airbox, no modification, no remap
• Washable, reusable, covered for two years from the date of purchase

Two elements, or one compromise

There are only two honest ways to run this medium on a road-registered sport-tourer. The first is to treat it as event equipment: keep the standard element, fit the racing one for the track day, swap it back afterwards and label the one on the shelf. The change is internal and reversible, so nothing is altered permanently. The second is to leave it in all year and accept that filtration has been reduced for every hour the engine runs, in exchange for a flow ceiling that road riding almost never reaches. Both are defensible. What is not defensible is choosing the second by accident, because the first sounded like too much work.

The condition attached to the trade

Racing media are built inside a maintenance culture that opens engines by operating hours, not by odometer readings. That is what covers the coarser weave: whatever gets past is found and dealt with long before it becomes wear. A Ninja 1000 SX serviced strictly to its road schedule is not running that safety net, and on that bike the standard P08 is simply the better balance. Nothing here promises power, either — a plug-in element can only give back the restriction it caused itself, and on a standard machine that share is small.

Care and cleaning

After a dusty weekend the PM111S F1-85 wants lukewarm water and a mild detergent: rinse until the water runs clear, then open air until it is dry through, never against heat, never near a flame. Otherwise compressed air from the clean side outwards is all it takes. It goes back in dry, and oiling is a step this medium does not have. The maintenance sheet is in the Downloads tab.

Fitment & Compatibility

Made for the Kawasaki Ninja 1000 SX, 2020 to 2026. The same PM111S F1-85 element covers five machines built around this airbox, including the Ninja 1100 SX, the Z1100 and the two Bimota models that share the engine; the complete list is in the Fitment tab.